CN108262336B - Solidification treatment method for electrolytic manganese slag - Google Patents
Solidification treatment method for electrolytic manganese slag Download PDFInfo
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- CN108262336B CN108262336B CN201810157001.5A CN201810157001A CN108262336B CN 108262336 B CN108262336 B CN 108262336B CN 201810157001 A CN201810157001 A CN 201810157001A CN 108262336 B CN108262336 B CN 108262336B
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- 239000002893 slag Substances 0.000 title claims abstract description 124
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 title claims abstract description 97
- 239000011572 manganese Substances 0.000 title claims abstract description 95
- 229910052748 manganese Inorganic materials 0.000 title claims abstract description 94
- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000007711 solidification Methods 0.000 title claims abstract description 9
- 230000008023 solidification Effects 0.000 title claims abstract description 9
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 64
- 239000002131 composite material Substances 0.000 claims abstract description 40
- 238000003756 stirring Methods 0.000 claims abstract description 29
- 239000003814 drug Substances 0.000 claims abstract description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 18
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000010881 fly ash Substances 0.000 claims abstract description 15
- 239000011575 calcium Substances 0.000 claims abstract description 14
- 229910052791 calcium Inorganic materials 0.000 claims abstract description 14
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 11
- 239000011574 phosphorus Substances 0.000 claims abstract description 11
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 33
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 16
- 239000004115 Sodium Silicate Substances 0.000 claims description 8
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims description 8
- 239000011780 sodium chloride Substances 0.000 claims description 8
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 8
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 8
- 229910052938 sodium sulfate Inorganic materials 0.000 claims description 8
- 235000011152 sodium sulphate Nutrition 0.000 claims description 8
- 150000001875 compounds Chemical class 0.000 claims description 7
- 238000000227 grinding Methods 0.000 claims description 7
- 239000000843 powder Substances 0.000 claims description 4
- BHEPBYXIRTUNPN-UHFFFAOYSA-N hydridophosphorus(.) (triplet) Chemical compound [PH] BHEPBYXIRTUNPN-UHFFFAOYSA-N 0.000 claims description 3
- 238000007873 sieving Methods 0.000 claims description 2
- 239000000654 additive Substances 0.000 claims 3
- 230000000996 additive effect Effects 0.000 claims 3
- 230000002195 synergetic effect Effects 0.000 claims 1
- 239000002699 waste material Substances 0.000 abstract description 6
- 239000002440 industrial waste Substances 0.000 abstract description 4
- 239000000203 mixture Substances 0.000 abstract description 3
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 239000002994 raw material Substances 0.000 abstract 1
- 238000005303 weighing Methods 0.000 description 12
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 9
- 238000002386 leaching Methods 0.000 description 7
- 238000002156 mixing Methods 0.000 description 7
- 239000000292 calcium oxide Substances 0.000 description 6
- 235000012255 calcium oxide Nutrition 0.000 description 6
- 229910052500 inorganic mineral Inorganic materials 0.000 description 5
- 231100000331 toxic Toxicity 0.000 description 5
- 230000002588 toxic effect Effects 0.000 description 5
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 4
- 239000003337 fertilizer Substances 0.000 description 4
- 235000010755 mineral Nutrition 0.000 description 4
- 239000011707 mineral Substances 0.000 description 4
- 239000004566 building material Substances 0.000 description 3
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 229910001385 heavy metal Inorganic materials 0.000 description 3
- 239000000395 magnesium oxide Substances 0.000 description 3
- 235000012245 magnesium oxide Nutrition 0.000 description 3
- 230000006641 stabilisation Effects 0.000 description 3
- 238000011105 stabilization Methods 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 229910000323 aluminium silicate Inorganic materials 0.000 description 2
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 229910052804 chromium Inorganic materials 0.000 description 2
- 239000011651 chromium Substances 0.000 description 2
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 2
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 2
- 239000011656 manganese carbonate Substances 0.000 description 2
- 235000006748 manganese carbonate Nutrition 0.000 description 2
- 229940093474 manganese carbonate Drugs 0.000 description 2
- 229910000016 manganese(II) carbonate Inorganic materials 0.000 description 2
- XMWCXZJXESXBBY-UHFFFAOYSA-L manganese(ii) carbonate Chemical compound [Mn+2].[O-]C([O-])=O XMWCXZJXESXBBY-UHFFFAOYSA-L 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910000403 monosodium phosphate Inorganic materials 0.000 description 2
- 235000019799 monosodium phosphate Nutrition 0.000 description 2
- 229920002401 polyacrylamide Polymers 0.000 description 2
- 239000010970 precious metal Substances 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- AJPJDKMHJJGVTQ-UHFFFAOYSA-M sodium dihydrogen phosphate Chemical compound [Na+].OP(O)([O-])=O AJPJDKMHJJGVTQ-UHFFFAOYSA-M 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 229910021578 Iron(III) chloride Inorganic materials 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 239000011398 Portland cement Substances 0.000 description 1
- BUGBHKTXTAQXES-UHFFFAOYSA-N Selenium Chemical compound [Se] BUGBHKTXTAQXES-UHFFFAOYSA-N 0.000 description 1
- 206010040844 Skin exfoliation Diseases 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- CSDREXVUYHZDNP-UHFFFAOYSA-N alumanylidynesilicon Chemical compound [Al].[Si] CSDREXVUYHZDNP-UHFFFAOYSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- -1 ammonium ions Chemical class 0.000 description 1
- 229910052925 anhydrite Inorganic materials 0.000 description 1
- 229910052785 arsenic Inorganic materials 0.000 description 1
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 1
- 239000002956 ash Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 230000035618 desquamation Effects 0.000 description 1
- 238000009854 hydrometallurgy Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 229910052711 selenium Inorganic materials 0.000 description 1
- 239000011669 selenium Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000010944 silver (metal) Substances 0.000 description 1
- GCLGEJMYGQKIIW-UHFFFAOYSA-H sodium hexametaphosphate Chemical compound [Na]OP1(=O)OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])O1 GCLGEJMYGQKIIW-UHFFFAOYSA-H 0.000 description 1
- 235000019982 sodium hexametaphosphate Nutrition 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 1
- 239000001577 tetrasodium phosphonato phosphate Substances 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
- 229910001845 yogo sapphire Inorganic materials 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
- B09B3/20—Agglomeration, binding or encapsulation of solid waste
- B09B3/25—Agglomeration, binding or encapsulation of solid waste using mineral binders or matrix
Landscapes
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention relates to a solidification treatment method of electrolytic manganese slag, belonging to the technical field of environmental protection; the electrolytic manganese slag is matched with alkaline industrial waste residue phosphorus slag, high-calcium fly ash, a composite alkaline agent, water and the like, the mixture is stirred, ammonia gas is recovered in the stirring process, and the electrolytic manganese slag after solidification is sent to a slag warehouse for piling; the method has wide raw material sources, reduces the dosage of the alkaline medicament, reduces the treatment cost of the electrolytic manganese slag, and simultaneously realizes the harmless treatment of treating wastes with processes of wastes against one another.
Description
Technical Field
The invention relates to a solidification treatment method of electrolytic manganese slag, belonging to the technical field of environmental protection.
Background
Manganese is one of important material and strategic resource of national economy in China. With the rapid development of national economic construction, the demand of manganese is increased, and the rapid development of the electrolytic manganese industry is promoted. At present, 131 household manganese-decomposing enterprises exist in China, the capacity reaches 290 million tons/year, the actual yield reaches 115 million tons/year, and both the capacity and the yield account for more than 98 percent of the world. The electrolytic manganese production industry, as a typical hydrometallurgy industry, is rapidly developed and also has serious harm to the environment, wherein the electrolytic manganese slag has prominent pollution to the environment.
The electrolytic manganese slag is acid leaching slag generated by leaching manganese carbonate mineral powder with sulfuric acid in the electrolytic manganese production process. According to the data, 8-10t manganese carbonate ore and 9-11t slag are required for producing 1t electrolytic manganese metal on average. The amount of electrolytic manganese slag discharged in China is nearly thousands of tons every year, and the accumulated stock over 7000 thousands of tons every year. The electrolytic manganese slag contains a large amount of SiO2、CaSO4、Al2O3、MgO、Fe2O3Besides inorganic minerals, certain amounts of ammonia nitrogen, Mn, Ag, Cr, Co, Ni, Se and the like also exist. At present, the research on the resource utilization of the electrolytic manganese slag mainly comprises the aspects of recovering valuable metals, producing building materials, preparing fertilizers and the like. In fact, in the aspect of recovering valuable elements from electrolytic manganese slag, because the content of residual precious metal resources in the slag is limited, even if the residual precious metal resources are completely recovered, the reduction effect on the slag amount is very little, and even a large increase is possible. In the aspect of producing building materials by using the electrolytic manganese slag, the slag contains a large amount of soluble sulfate, so that the structure of the building materials can be damaged, and severe phenomena such as frosting and desquamation can be caused. In the aspect of preparing the fertilizer by using the electrolytic manganese residues, although a plurality of researches show that the fertilizer is feasible, the long-term effect influence of the accumulation of heavy metals in crops and soil on organisms cannot be solved, and the fertilizer using the electrolytic manganese residues has certain ecological risks. Therefore, under the background that the resource prospect of the electrolytic manganese slag is not clear and the utilization difficulty is high, the slag storage is still the first choice for the treatment of the electrolytic manganese slag. To realize the safety of the electrolytic manganese slagThe stockpiling must be carried out harmless treatment, and the key of the treatment is the stabilization control of soluble manganese and associated heavy metal ions of arsenic, mercury, selenium, chromium and ammonia nitrogen in the slag. Therefore, the electrolytic manganese slag is subjected to solidification/stabilization treatment to be stockpiled.
The solidification/stabilization of the electrolytic manganese slag has been reported in the patent and literature: for example, CN104307849A discloses that quicklime, plant ash, fly ash and sodium hexametaphosphate are used as medicaments to solidify/stabilize the electrolytic manganese slag. CN102161048A discloses a harmless treatment agent for electrolytic manganese slag, which is prepared from quicklime powder, silicate, resin sulfonate and ferric chloride. CN104690080A discloses that the harmless treatment agents of the electrolytic manganese slag are sodium dihydrogen phosphate, calcium oxide, magnesium oxide and polyacrylamide. In addition, ordinary portland cement is adopted to carry out curing treatment on the electrolytic manganese slag. Zhou et al treated the electrolytic manganese slag with CaO, NaOH. As can be seen, the harmless treatment agents for the electrolytic manganese residues are calcium oxide, sodium hydroxide, phosphate, cement and the like. Sodium dihydrogen phosphate, calcium oxide, magnesium oxide, polyacrylamide, sodium hydroxide, cement and the like are used as harmless treatment agents for electrolytic manganese slag, and the agent cost is high, and the mixing amount is large, so that the overall treatment cost is high, and the popularization and industrial application of the technology are seriously influenced. Therefore, the adoption of any technical approach to realize low-cost treatment of the electrolytic manganese slag is a key technology urgently needed to be solved for harmless treatment and application.
Disclosure of Invention
Aiming at the problems, the invention provides a method for solidifying and treating electrolytic manganese slag, which takes industrial waste residue phosphorus slag, mineral slag and high-calcium fly ash as a solidifying agent and is matched with a composite alkaline medicament and water to cooperatively treat the electrolytic manganese slag; the method can reduce the dosage of alkaline medicament, reduce the solidification treatment cost of the electrolytic manganese slag and play a role in treating wastes with processes of wastes against one another.
In order to achieve the purpose, the technical scheme adopted by the invention comprises the following steps:
(1) weighing electrolytic manganese slag by a metering device, conveying the electrolytic manganese slag to a crusher for crushing;
(2) weighing a composite alkaline medicament, adding the composite alkaline medicament into water, and uniformly mixing to prepare a composite alkaline medicament solution;
(3) conveying the crushed electrolytic manganese slag into a stirrer, adding the composite alkaline medicament solution obtained in the step (2) in a stirring state, stirring for 5-10min, then adding a curing agent, and stirring for 15-30 min; and (4) recovering ammonia gas in the stirring process, and conveying the solidified electrolytic manganese slag to a slag warehouse for piling.
The adding amount of the composite alkaline agent is 3-6% of the weight of the electrolytic manganese slag, the adding amount of the water is 25-35% of the weight of the electrolytic manganese slag, and the adding amount of the curing agent is 10-20% of the weight of the electrolytic manganese slag.
The composite alkaline agent is a mixture of sodium hydroxide, sodium sulfate, sodium chloride and sodium silicate, and the mass percentages of the substances are 30-50% of sodium hydroxide, 10-20% of sodium sulfate, 20-40% of sodium chloride and 10-20% of sodium silicate; the compound alkaline agent solution is prepared by dissolving compound alkaline agent in water.
The curing agent consists of 30-60% of phosphorous slag, 30-50% of slag and 10-20% of high-calcium fly ash by mass percent; grinding the curing agent and sieving the powder with a 80-mesh sieve, wherein the sieve residue is less than 5 percent.
The invention has the advantages and beneficial effects that:
(1) according to the method for curing the electrolytic manganese slag, the industrial waste residue phosphorus slag, the slag and the high-calcium fly ash are used as curing agents and are matched with the composite alkaline medicament, so that the dosage of the alkaline medicament is reduced on the premise of ensuring harmless treatment of the electrolytic manganese slag, the curing treatment cost of the electrolytic manganese slag is reduced, and the effect of treating wastes with processes of wastes is achieved;
(2) the phosphorus slag, the slag and the high-calcium fly ash are alkaline industrial waste residues, and the ammonia removal effect of the electrolytic manganese slag can be enhanced and the dispersibility and uniformity of the mixture can be improved by adding the phosphorus slag, the slag and the high-calcium fly ash;
(3) the electrolytic manganese slag is solidified by the phosphorous slag-high calcium fly ash solidifying agent to finally form gel mineral with good durability and aluminosilicate as the main part, partial soluble manganese and ammonium ions in the electrolytic manganese slag can be embedded in a chemical bonding ceramic body with aluminum silicon as the main part through isomorphism substitution, and meanwhile, partial soluble manganese can form insoluble Mn (OH) in an alkaline environment2；
(4) The aluminosilicate gel mineral is mostly in a zeolite-like amorphous structure, and has good durability characteristics and good heavy metal adsorption performance. Compared with the traditional technology, the method for harmlessly electrolyzing the manganese slag is safer and more effective.
Detailed Description
The present invention is further illustrated by the following examples, but the scope of the present invention is not limited to the above-described examples.
Example 1
(1) Weighing electrolytic manganese slag, conveying the electrolytic manganese slag to a crusher for crushing;
(2) weighing a composite alkaline agent, adding the composite alkaline agent into water, and uniformly mixing to prepare a composite alkaline agent solution, wherein the addition amount of the composite alkaline agent is 3% of the weight of electrolytic manganese slag, the addition amount of water is 25% of the weight of electrolytic manganese slag, and the composite alkaline agent consists of 50% of sodium hydroxide, 10% of sodium sulfate, 20% of sodium chloride and 20% of sodium silicate;
(3) conveying the crushed electrolytic manganese slag into a stirrer, adding the compound alkaline medicament solution (2) in a stirring state, stirring for 10min, adding a curing agent (the curing agent consists of 60% of phosphorus slag, 30% of slag and 10% of high-calcium fly ash, grinding the curing agent by a 80-mesh sieve, wherein the balance of the sieve is 3%), stirring for 30min, recovering ammonia gas by an ammonia gas collecting device in the stirring process, and conveying the cured electrolytic manganese slag to a slag warehouse for piling.
The solidified electrolytic manganese slag is leached by the method of HJ 557-Yi 2010, and the toxic leaching result is lower than the standard limit value of GB 8978-Yi 1996.
Example 2
(1) Weighing electrolytic manganese slag, conveying the electrolytic manganese slag to a crusher for crushing;
(2) weighing a composite alkaline agent, adding the composite alkaline agent into water, and uniformly mixing to prepare a composite alkaline agent solution, wherein the addition amount of the composite alkaline agent is 4% of the weight of electrolytic manganese slag, the addition amount of water is 30% of the weight of electrolytic manganese slag, and the composite alkaline agent consists of 30% of sodium hydroxide, 20% of sodium sulfate, 40% of sodium chloride and 10% of sodium silicate;
(3) conveying the crushed electrolytic manganese slag into a stirrer, adding the compound alkaline medicament solution (2) in a stirring state, stirring for 5min, adding a curing agent (the curing agent consists of 50% of phosphorus slag, 30% of slag and 20% of high-calcium fly ash, grinding the curing agent by a 80-mesh sieve, wherein the balance of the sieve is 4%), stirring for 25min, recovering ammonia gas by an ammonia gas collecting device in the stirring process, and conveying the cured electrolytic manganese slag to a slag warehouse for piling.
The solidified electrolytic manganese slag is leached by the method of HJ 557-Yi 2010, and the toxic leaching result is lower than the standard limit value of GB 8978-Yi 1996.
Example 3
(1) Weighing electrolytic manganese slag, conveying the electrolytic manganese slag to a crusher for crushing;
(2) weighing a composite alkaline agent, adding the composite alkaline agent into water, and uniformly mixing to prepare a composite alkaline agent solution, wherein the addition amount of the composite alkaline agent is 5% of the weight of electrolytic manganese slag, the addition amount of water is 35% of the weight of electrolytic manganese slag, and the composite alkaline agent consists of 40% of sodium hydroxide, 15% of sodium sulfate, 30% of sodium chloride and 15% of sodium silicate;
(3) conveying the crushed electrolytic manganese slag into a stirrer, adding the compound alkaline medicament solution (2) in a stirring state, stirring for 8min, adding a curing agent (the curing agent consists of 40% of phosphorus slag, 40% of slag and 20% of high-calcium fly ash, grinding the curing agent by a 80-mesh sieve, wherein the balance of the sieve is 2%), stirring for 20min, recovering ammonia gas by an ammonia gas collecting device in the stirring process, and conveying the cured electrolytic manganese slag to a slag warehouse for piling.
The solidified electrolytic manganese slag is leached by the method of HJ 557-Yi 2010, and the toxic leaching result is lower than the standard limit value of GB 8978-Yi 1996.
Example 4
(1) Weighing electrolytic manganese slag, conveying the electrolytic manganese slag to a crusher for crushing;
(2) weighing a composite alkaline agent, adding the composite alkaline agent into water, and uniformly mixing to prepare a composite alkaline agent solution, wherein the addition amount of the composite alkaline agent is 6% of the weight of electrolytic manganese slag, the addition amount of water is 30% of the weight of electrolytic manganese slag, and the composite alkaline agent consists of 35% of sodium hydroxide, 20% of sodium sulfate, 25% of sodium chloride and 20% of sodium silicate;
(3) conveying the crushed electrolytic manganese slag into a stirrer, adding (2) a composite alkaline medicament solution under the stirring state, stirring for 6min, adding a curing agent (the curing agent consists of 40% of phosphorus slag, 50% of slag and 10% of high-calcium fly ash, grinding the curing agent by a sieve of 80 meshes, wherein the screen residue is 3%), stirring for 15min, recovering ammonia gas by an ammonia gas collecting device during the stirring process, and conveying the cured electrolytic manganese slag to a slag warehouse for piling.
The solidified electrolytic manganese slag is leached by the method of HJ 557-Yi 2010, and the toxic leaching result is lower than the standard limit value of GB 8978-Yi 1996.
Example 5
(1) Weighing electrolytic manganese slag, conveying the electrolytic manganese slag to a crusher for crushing;
(2) weighing a composite alkaline agent, adding the composite alkaline agent into water, and uniformly mixing to prepare a composite alkaline agent solution, wherein the addition amount of the composite alkaline agent is 4% of the weight of electrolytic manganese slag, the addition amount of water is 35% of the weight of electrolytic manganese slag, and the composite alkaline agent consists of 45% of sodium hydroxide, 15% of sodium sulfate, 25% of sodium chloride and 15% of sodium silicate;
(3) conveying the crushed electrolytic manganese slag into a stirrer, adding (2) a composite alkaline medicament solution under the stirring state, stirring for 8min, adding a curing agent (the curing agent consists of 40% of phosphorus slag, 45% of slag and 15% of high-calcium fly ash, grinding the curing agent by a sieve of 80 meshes, wherein the screen residue is 3%), stirring for 28min, recovering ammonia gas by an ammonia gas collecting device during the stirring process, and conveying the cured electrolytic manganese slag to a slag warehouse for piling.
The solidified electrolytic manganese slag is leached by the method of HJ 557-Yi 2010, and the toxic leaching result is lower than the standard limit value of GB 8978-Yi 1996.
The above-described embodiments are only some of the preferred embodiments of the present invention, and variations and substitutions which are within the scope of the present invention and which are made by those skilled in the art are also intended to be included in the scope of the present invention.
Claims (1)
1. The solidification treatment method of the electrolytic manganese slag is characterized by comprising the following steps: phosphorus slag, slag and high-calcium fly ash are used as curing agents, and a composite alkaline agent and water are matched for synergistic treatment of electrolytic manganese slag;
the additive amount of the composite alkaline agent is 3-6% of the weight of the electrolytic manganese slag, the additive amount of water is 25-35% of the weight of the electrolytic manganese slag, and the additive amount of the curing agent is 10-20% of the weight of the electrolytic manganese slag;
the composite alkaline medicament comprises the following components in percentage by mass: 30-50% of sodium hydroxide, 10-20% of sodium sulfate, 20-40% of sodium chloride and 10-20% of sodium silicate;
the mass percentages of the phosphorous slag, the slag and the high-calcium fly ash in the curing agent are respectively 30-60%, 30-50% and 10-20%; grinding the curing agent and sieving the powder with a 80-mesh sieve, wherein the sieve allowance is less than 5 percent;
the specific operation is that the compound alkaline medicament is mixed with water to prepare compound alkaline medicament solution; conveying the crushed electrolytic manganese slag to a stirrer, adding a composite alkaline medicament solution in a stirring state, stirring for 5-10min, adding a curing agent, and stirring for 15-30 min; and (4) recovering ammonia gas in the stirring process, and conveying the solidified electrolytic manganese slag to a slag warehouse for piling.
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| CN104083845A (en) * | 2014-07-11 | 2014-10-08 | 广西大学 | Method for stabilizing water-soluble manganese ions in manganese ore leaching residue |
| CN104307849B (en) * | 2014-10-13 | 2016-07-06 | 中国环境科学研究院 | A kind of electrolytic manganese residues solidification/stabilization treatment method |
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